The World No. 1 stuns on stage as she introduces her friend Beyonce.
The USTA and Genie Bouchard are still at odds, with no resolution on the immediate horizon.
World No. 24 extends five-year partnership with racquet brand.
The fabled old court and its stunning viewpoints will be back for one more year at the U.S. Open.
The three players will have a hearing in late September.
Spaniard nets first ever ATP title in third final this season.
"Everything takes a lot of energy," Roland Garros champion says of New York experience.
